Charles a



Cdibttnd gisten @anni 691mm.

CHARLES A. BUSH, or NEW LONDO.\.',Ass1GNOR, FOR TWO-'mums OF His B1C1`1T,TO HENRY P. OSTRUM AND T. CLiFFORD BUSH, OF NEW HAVEN, CONNECTICUT.

Letters Patent No. 96,198, dated October 26, 1869.

y INPROVED INSULATOR POR TBLEGRAPH- WIRES The Schedule referred cc in these Letten Patent and making part o1 the lame.

I, CHARLizs A. BUSH, of the. town of N cw London, in the county ofNew London, und Stute of Connecticul, have invented certnin I improvements in Insulators, of which the following i's a spccitication.

My inventionrelntus to the application of n. rubber cup ur covering lo a hrnnlrct or prrtie, or the insertion oi' a. luhber lining in glass, porcelain, or other nonconducting substance, in such n manner that electricity shall not'escape by menus of the bracket or pintle or tln'onghhe glass, porcelain, or other substance, in' which'there muy be cmeks or other imperfections.

The object of my invention being to prevent the escape of ciectricity, to tienden the sound caused by the vibration ofthe wires, und to hold the glass, porcelain, or other substance securely to the bracket or pinne- Figure 1 is a side elevation of what embodies my invention.

Figure 2 is a longitudinal section ofthe same. Y,

Figures 3 and 4 are a plan und au elevation of O, which isshown in section in lig. 2.

A is the glass, porcelain, or other substance.

b is the pintle or bracket, upon which is placed the lpurpose'hereinbefom set forth.

rubber @np or covering C, or which is forced into thc rubber lining C, inserted in A.

The rubber cap, covering, or lining c has, at the bottom, a flange, which is smaller than. that. part of thecavity in A to which it reaches, so that when any moistuw gets insivlc,`t cannot form n conductor that willv reach the pintlc or lime-kot. i

This nnge also prevents min or snow from hentmg inside iin' enough to injure the perfection of the. msulation, and 'hinders spiders from weaving webs, which serve, by means of moisture which accumulates tk ercon, to conduct off the electricity.

I claim, as my invention;-

1. The rubber cap or covering for the brarketor piutle, substantially as and for the purpose hereinbefore set forth.

2. The riibber lining for glass, porcelain, or other nOu-conducting substance, substantially is and for the CHAS. A. BUSH. Witnesses: EDWIN M. Coin-ELL,

PmLo P.' Bosa. 

